Electric cable.



Patented May I4, |90I.

un. 673,903. f

J. C. GULIJ.`

ELECTRIC CABLE.

(Application med Apr. Q, 189B.)

(lo Model.)

Ammyfys.

1" 15 Numsgncns op., mommwo.. wAsHmnfon. n. c.

n UNiTED STATESy PATENT OFFICE;

JOHN D.y GOUID, OF BROOKLYN, NEW YORK.

ELECTRIC CABLE.

SPECIFICATION forming part Of Letters Patent N 0 673,903, dated May 14,1901.

Application filed April 6, 1898,.

To all whom it may concern:

- Be it known that I, JOHN D. GOULD, of the city of NewYork, borough ofBrooklyn,in the county of Kings and State of New York, have invented anew and-Improved Electric Cable, of which the 4following'is a full,clear, and exact description. e

This invention relates to an improved construction of cables forconducting electric currents, particularly those for electric light-Reference is to be had to the accom panying drawings, forming a part ofthis specication,

in which similar characters of reference indicate correspondingparts inall the views.

Figures 1, 3, 5, .7, and k9 show diierent vforms of cable embodying myinvention, and

Figs. 2, 4, 6, 8, andv 10 are cross-sections of the various forms.

In Fig. l I have shown two working-current conductors 1 2,v eachhaving'a 'cover ofy insulating material, and a thermostatic or alarm 4conductor ab, comprising afusible core or wire 3havi-ng aninsulating-covering 4,' around which iswound acopper or similarconductor 5, the whole having an insulating-covert.

'The wires or conductors 3 5 are designed to y be connected with afire-alarm system.,` The several conductors are wound spirallytogether,so that the thermostatic conductor,

` or rather its covering, is arranged between the working-currentconductors, and consequently engages therewith throughoutV the length ofthe cable. 'lhe vcombined cable has an insulating-cover 7, and in orderto make the combined cable substantially round I have shown a dummy orcord 8 as opposing the Serial No. 676,626. (No model.)

thermostatic conductor, as plainly indicated in Fig. 2. V

In Fig..3 I have shown the conductors 1 2 and the thcrmostatic conductoras arranged in a straight line, the thermostatic conductor of courseengaging with the other conductors.

In Fig. 5 I have shown a working conductor 9 and the thermostaticconductor as twisted thereon.

In Fig. L7 in connection with the conductor 9 and the thermostaticconductor I have shown rtwo dummies or cords IO ll, employed simply togive a substantially round appearance to the combined cable.

The examples shown in Figs. 5 and 7 are designed for use when the groundis used as the return. The examples showninFigs. l and 3, however, arefor a complete metallic working circuit.

In Fig. 9 I have shown what may be termed a trunk-line cable -that is,it contains a large number of working-current conductors l2, that may beused for various purposes,

and the several conductors are twisted together with a thermostaticconductor and the whole has a covering 13 of insulating material.

- In each example of my improvement a ther- Vmostatic conductor isarranged along thepecurrent to electric lights it is obvious that itforms a protector throughout the entire length of the cable, which isnot the case when ordinary thermostats are placed in a building and at aconsiderable distance apart.

Having thus described my invention, I-

claim yas new and desire to secure by Letters and a single-thicknesscovering for theca- Y Patentl ble and against the inner'surf-ace ofwhich ro. An electric cable, comprising a workingthe thermostaticconductor engages, substan-` v I eurrentconductor and ather'mostaticconductially as specified. I l 5 tor', the said thermostatic conductorconsist- JOHN D. GOULD. ing of a fusiblefcore anda Wire coiled aroundWitnesses: l

thecore but insulated therefrom and also in- Y. JNO. M. -RITTE R,sulated from the Working-current conductor, 'y C..R. FERGUSON.

